subtract 10%iles      0.00000      0.00000    0.0171685    0.0398645
    0.0678360     0.105870     0.163085     0.264119     0.521877
diff 10%iles    -0.201248   -0.0784416   -0.0332570  -0.00806952      0.00000
   0.00617075    0.0312116    0.0758290     0.198425
stardiff 10%iles   -0.0274408  -0.00934902  -0.00263393      0.00000
  0.000795285   0.00481020   0.00973809    0.0174616    0.0363009
stardiff contour -excluded 0.005   -0.0274408    0.0363009